Spring hinge for pulp screens



Oct. 30, 1928. 1,689,687

G. REYNOLDS SPRING HINGE FOR'PULP SCREENS Filed Nov. 2e, 1927 fnl-.

Patented Get. 30, 1928.

,UNITED STATES GEORGE REYNOLDS, OF ANDERSON, INDIANA.

y SPRING HINGE Fon PLPVSCRENS.

Application' inea November 2e, 1927.V 'serial Np. esatta.v

This invention relates to a spring hinge or resilient mounting orconnection for the di a phragrn in pulpmachinesand thelikel y It isparticularly aimed to provide a substantially nonsbreakable andadjustable construction whereby t-he blocks can be maintained centeredwith respect tothe operating cams, and one having a bar holding down theouter ends of the springs to avoid breaking of the springs at the baseor Zones of attachment, and a more secure underarm havlessen vibration.

A very important object is to produce a construction wherein the springswill flex from lines intermediate their fastenings to avoid breakage asaforesaid.

Various additional objects and advantages will be pointed out or becomeapparent from a consideration of the description following taken inconnection with accompanying` drawings illustrating an operative embodiHment.

In said drawings:

Figure 1 is a view in cross section taken transveresly through a pulpmachine having my improvements applied thereto;

Figure 2 is a front elevation of the parts of Figure 1;

Figure 3 is a plan view of the hinge device, partly broken away todisclose details; and n Figures 4 and 5 are sectional views taken on thelines 4-4 and 5 5 of Figure 3.

Referring specifically to the drawings, A generally designates a.conventional paper pulp or similar machine, whose specific structureforms no part of the invention and which is illustrated to make myinvention clearer. The pulp box, receptacle or hopper is shown at havingusual diaphragms operating therein through vertically7 Vmovable plungers11 by operation of cams 12 with which they contact, and which camsaremounted on a shaft 18 rotated from any suitable source of power. Areinforcing angle iron 14 extends below the box 10, joining andreinforcing the sides of the machine or frame thereof.

In carrying out my invention, a rigid under arm 14a has a hook terminal15 which engages the vertical flange of angle bar 14 and its otherterminal is bolted at 16 to the sill of the screen.

Two return spring plates or 4members 17 and 18 are used for the plungers11 and the di phragms operated thereby. Relatively ing a particular iitwith the angle iron tov adjustableanchor plates 19 and 2Oi-have`in-Ater-engaginfr serrations 21 and the former has interengaging serrationsAwith the angle iron 14 at 22. Bolts 23 pass through holes .in spring 18and saidA plates` 19and 20'and the under arm 14a. One end of spring 17is curled into a clampv 25, which surrounds a pin 26 carried by theplate 19 and is fastened thereto by bolts 27. Said pin 26 is removable,being secured in place by screw members 28 carried by the plate 19 andhaving cylindrical extensions 29 on which the pin 26 will rock. Theopposite end of spring 17 is free, being located in an opening 30 in thcplunger 11, and which opening is enlarged with respect to the saidspring end. Such end is also formed into a clamp 31 which encloses a pin32 for reinforcement o'f such end. The adjacent end of spring 18 has anL-shaped terminal. 83 so thatit may iit the top and bottom walls in theslot or opening 30 and house the adjacent end of spring 18, permittingvertical movement thereof relatively.

To prevent the flexing of the spring members 17 and 18 from theirconnections and insure fiexing intermediate such connections, a holddownin the form of a T-shaped bolt or fulcrum member 35 is provided.v Bolt35 has a shank 36 passing through slots in spring members 17 and 18 andunderarm 14, and the slot of spring member 17 being longitudinallyelongated and designated 36.

hank 36 depends from a cross arm 37 resting on spring member 18 andhaving depending terminal lugs 37a at the sides of the spring member 17and 18 to assist in holding them against relative lateral movement.

. The opening or slot in plate 19 which accommoda-tes bolt 23 anddesignated as 38 and is enlarged to facilitate adjustment of the partsto center the machine blocks relatively to the operating cams 12.

Various changes may be resorted to with* in the spirit and scope of myinvention.

I claim :e

1. In a machine of the class described, in combination with a plungerprovided with a slot, and relatively stationary guide means for theplunger, return spring means exf tended into said slot, means to anchorsaid return spring means, an under arm, andY j slot, a return springhaving an L-shaped terminal disposed in said slot, a second returnspring, the latter' spring havlngone endlocated vWithin said terminal,and means anehoring said springs.

3. In a machine of the class described, iny combination with `a plunger,return spring members engagingsaid plunger, a relatively stationaryiron, securing. `plates constituting terminals for said springs, meanssecuring said plates adjustably together and to said iron, an undervzrrmsecured to said iron, and

hold-down meansr for said springs secured to the under arm. f

v 4. In ,a machine of theclass described, a

spring device comprising aspringmember 4havinglan L-shaped terminal, aspring member at one end disposed in said terminal and movablerelatively thereto, engaging serrated clamp plates, a clamp on one ofthe spring members engaging one of the plates, fastening means securingthe other spring member and the plates adjustably together and adaptedfor connection to a support, andv a hold-down for thespringspassing,therethrough.

In testimony whereof I my signature.

GEORGE eiiYNoLDs.

